Why don’t engineers look at destinations and how they are accessed? I’ve heard that travel has stayed constant at one hour from Roman times. In an hour a walker can access four or five destination if the land use diversity is on a 1/4 mile footprint. A cyclist can access the same number of destinations on a three mile footprint. Transit is complicated by arrival and departure times. But assume that the land use diversity is focused on a walkable footprint. Then one could access four or five destinations by bus and walking in an hour if the bus footprint was seven miles. Trains and walking could access four or five destinations on a 25 mile footprint- assuming cost and speed aren’t such great factors. Autos however are simpler if cost and health are ignored; like walking and biking but on 200 mile footprint. Currently this is the only design parameter utilized.
That’s why walking and biking are inconvenient and road space is a challenge. Unless you choose where you live there is 1.5-2x difference with driving. Worse transit with its fixed routes can’t stay up. Equivalent travel times to destination access by driving are 4-8x.
Land use diversity, destination density, and a modal footprint should be necessary design parameters to reduce the heavy human footprint on the biosphere.